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[libc] Add backup definition for LONG_WIDTH in limits-macros.h. #79375

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Merged
merged 2 commits into from
Jan 24, 2024
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[libc] Add backup definition for LONG_WIDTH in limits-macros.h. #79375

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[libc] Add backup definition for LONG_WIDTH in limits-macros.h.
lntue Jan 24, 2024
04434de
Add comment why the backup is needed.
lntue Jan 24, 2024
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3 changes: 2 additions & 1 deletion libc/include/llvm-libc-macros/limits-macros.h
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,8 @@
#elif defined(__WORDSIZE)
#define LONG_WIDTH __WORDSIZE
#else
#error "Unknown WORDSIZE to define LONG_WIDTH."
// Use sizeof(long) * CHAR_BIT as backup. This is needed for clang-13 or before.
#define LONG_WIDTH (sizeof(long) * CHAR_BIT)
#endif // __LONG_WIDTH__
#endif // LONG_WIDTH

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